理研RIBFにおける稀少RIリングの現状 (2)

We constructed the isochronous storage ring named “Rare-RI Ring (R3)” at RIKEN RI Beam Factory. Recently, we demonstrated a high-precision mass-measurement capability for the extremely short-lived and rarely-produced exotic
nuclei by means of the time-of-flight based mass-spectrometry using R3. We measured one-by-one the revolution times for accepted nuclei including not only the mass-reference nucleus but also the unknown-mass nuclei. One of the massreference nuclei circulates under the isochronous condition. The momentum dependence of the revolution times of stored nuclei was corrected by using their velocities measured in the beam transport line before the injection. Consequently, the mass-to-charge ratios are proportional to the corrected revolution time, and the mass precision is ensured by the precision of the isochronism. We have introduced an event-by-event technique for the first time in the storage ring experiment to make precision mass measurement for extremely rarely produced nuclei possible. That was established with a newly
developed self-triggered injection technique and an in-flight particle identification technique. Here, we report on the present status of R3.

書誌情報

2019年第16回日本加速器学会年会プロシーディング

p. 645-648, 発行日 2019-11

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理研RIBFにおける稀少RIリングの現状 (2)

× 阿部, 康志

× 山口, 由高 (RIKEN)

× 上坂, 友洋(RIKEN)

× Naimi, Sarah(RIKEN)

× 洲嵜, ふみ(RIKEN/原研)

× 長江, 大輔(RIKEN/九大)

× Li, Hongfu((RIKEN/IMP)

× 大甕, 舜一朗(埼玉大)

× 山口, 貴之(埼玉大)

× 荒川, 裕樹(埼玉大)

× 猪俣, 玖美(埼玉大)

× 小林, 孝彰(埼玉大)

× 西室, 国光(埼玉大)

× 稲田, 康人(埼玉大)

× 坂上, 護(埼玉大)

× 細井, 駿(埼玉大)

× 横田, 健次郎(埼玉大)

× 梶木, 大輔(埼玉大)

× 濱川, 大貴(埼玉大)

× 竇, 文博(埼玉大)

× 小沢, 顕(筑波大)

× 森口, 哲朗(筑波大)

× 向井, もも(筑波大)

× 上岡, 大起(筑波大)

× 景澤, 怜央(筑波大)

× 道正, 新一郎(東大CNS)

× 大田, 晋輔(東大CNS)

× 北村, 徳隆(東大CNS)

× 増岡, 翔一朗(東大CNS)

× 鈴木, 伸司(IMP)

× Ge, Zhuang(IMP)

× Wang, Qian(IMP)

× Wang, Kailong(CMU)

× Litvinov, A Yury(GSI)

× 若杉, 昌徳(理研/京大化研)

× Abe, Yasushi

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